ALL CHARACTERS are over 18 and consensually
RAF (angel's friends)
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And Sulfus (angel's friends)
External
External
Sulfus's challenge*
Image
Or
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RAF is nude, just her halo floating Above her head
Sulfus is half dressed (tops or bottoms)
Sulfus - "if you moan, you lose."
RAF - "I won't lose!"
*in Angel's Friends, The angels and devils challenge each other to
see who gets to influence their human charge first.
Anything goes except touching each other. So RAF is consensual.